Paul Eggert wrote:
> I suggest looking how glibc implements the qualifier-generic strchr
> macro for C, and doing something similar. See glibc commit
> cd748a63ab1a7ae846175c532a3daab341c62690 dated 2025-11-20.
See also the code in gnulib/lib/string-desc.h which determines whether
_Generic is available:
/* Whether the compiler supports _Generic.
Test program:
int f (int x) { return _Generic (x, char *: 2, int: 3); }
*/
#if (defined __GNUC__ && __GNUC__ + (__GNUC_MINOR__ >= 9) > 4 && !defined
__cplusplus) /* C mode */ \
|| (defined __clang__ && __clang_major__ >= 3) /* both C and C++ mode */ \
|| (defined __SUNPRO_C && __SUNPRO_C >= 0x5150) /* C mode */ \
|| (__STDC_VERSION__ >= 201112L && !defined __GNUC__) /* C mode */
# define HAVE__GENERIC 1
#endif
Bruno
